Pith Number

pith:MPTRSLBE

pith:2014:MPTRSLBERSJ63UYZFTHT6OECJC

not attested not anchored not stored refs pending

On the Combinatorics of Locally Repairable Codes via Matroid Theory

Camilla Hollanti, Ragnar Freij, Thomas Westerb\"ack, Toni Ernvall

arxiv:1501.00153 v3 · 2014-12-31 · cs.IT · math.CO · math.IT

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MPTRSLBERSJ63UYZFTHT6OECJC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:22:12.860744Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63e7192c248c93edd3192ccf3f388248a07f3d708d4e0818ebaf485bf0357bef

Aliases

arxiv: 1501.00153 · arxiv_version: 1501.00153v3 · doi: 10.48550/arxiv.1501.00153 · pith_short_12: MPTRSLBERSJ6 · pith_short_16: MPTRSLBERSJ63UYZ · pith_short_8: MPTRSLBE

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/MPTRSLBERSJ63UYZFTHT6OECJC \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 63e7192c248c93edd3192ccf3f388248a07f3d708d4e0818ebaf485bf0357bef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86d9a8c59348bf36a5df94aba0657a73c097ae89e2b193efb0b7af2858cda7f7",
    "cross_cats_sorted": [
      "math.CO",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-12-31T15:34:32Z",
    "title_canon_sha256": "ef2051dea059ad586abf381a7d82289877d09730daa0634269faa87c3d46c006"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.00153",
    "kind": "arxiv",
    "version": 3
  }
}